fix(teams): say "game server", not "shard", on the never-synced Teams panel

Admin → Teams told an operator that an unsynced projection "is not a
confirmed empty shard". Teams is a core primitive and core's word for the
host is the game server; "shard" is Ultima Online's. The detail now reads
"What is shown below does not confirm that the game server has no Teams."

The matching test, and the four comments that said "shard" about the same
state, follow it. Found while making runicgateway.com's core docs
game-neutral (runicgateway.com#34), which had to paraphrase this line
rather than quote it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

client/src/lib/teamAdmin.js

@@ -3,7 +3,7 @@
 //
 // Plain JS with tests, following lib/moduleAdmin.js. The reason it is worth
 // splitting here specifically: this screen's job is to tell an operator the
-// difference between "the shard has no Teams" and "core has not been able to ask
+// difference between "the game server has no Teams" and "core has not been able to ask
 // for two hours", and those two produce almost the same page. Getting that
 // wording right is logic, not markup.
 
@@ -31,7 +31,7 @@ export function freshnessOf(sync = {}) {
     return {
       tone: TONE.bad,
       label: 'Never synced',
-      detail: 'Core has never had an answer it could trust. What is shown below is not a confirmed empty shard.',
+      detail: 'Core has never had an answer it could trust. What is shown below does not confirm that the game server has no Teams.',
     }
   }
   if (sync.stale) {